test: git

This is the contents of .github/workflows/testing.yml:

name: Code Checks

on:
  push:
    branches:
    - master
  pull_request:
    branches:
    - master

jobs:
  build:
    runs-on: ubuntu-latest
    strategy:
      matrix:
        python-version: [3.6, 3.7]

    steps:
    - uses: actions/checkout@v2
    - name: Set up Python ${{ matrix.python-version }}
      uses: actions/setup-python@v1
      with:
        python-version: ${{ matrix.python-version }}
    - name: Test with pytest
      run: |
        make install-test
        make check

Adding this to git will automate the tests on each pull request. Note how we're able to re-use our Makefile here!